DevTools.at
100+ Tools100% 100% Secure

DevTools.at

Free Online Developer Tools

Your data never leaves your device

100+
Tools
100%
Client-Side
0
Data Stored
20+
Languages

Lightning Fast

All tools run locally in your browser

100% Secure

Your data never leaves your device

Always Free

No registration, no limits, no ads

20+ Languages

Available worldwide. Works on desktop, tablet, and mobile.

REST API

REST API for automation and CI/CD pipelines.

Works Offline

Once loaded, tools work even without internet.

Tools

100 tools for encoding, formatting, generating, converting, and more.

API Development

  • Format & validate JSON/XML
  • Encode/decode Base64 & JWT
  • Generate UUIDs & test data

Security & Auth

  • Secure passwords & hashes
  • HMAC & bcrypt generation
  • URL encode & SQL escape

Frontend & Design

  • CSS gradients & shadows
  • Color palettes & favicons
  • Flexbox & grid layouts

Free Online Developer Tools

No registration, no limits, no ads